Melting point :285°C
Boiling point :500°C (estimate)
Density :1.366 (estimate)
refractive index :1.6490 (estimate)
storage temp. :Refrigerator, Under Inert Atmosphere
solubility :DMSO (Slightly), Water (Slightly)
form :solid
pka :-0.66±0.50(Predicted)
color :Off-White to Pale Beige
Water Solubility :It is soluble in water.
Sensitive :Hygroscopic
Merck :4773
CAS DataBase Reference :98-71-5(CAS DataBase Reference)
EPA Substance Registry System :Benzenesulfonic acid, 4-hydrazino- (98-71-5)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405 Store locked up.